Practice Free 300-820 Exam Online Questions
Refer to the exhibit.
If the Webex Teams device cannot connect to Video Mesh Cluster-1 because it is busy, which media node does the Webex Teams device connect to next?
- A . Both Cloud Node US-EAST and US-WEST
- B . Video Mesh Cluster-2
- C . Cloud Node US-EAST
- D . Cloud Node US-WEST
Refer to the exhibit.
Mobile Cisco Jabber cannot register with on-premises Cisco Unified Communications Manager using Mobile and Remote Access. Some logs were captured on Expressway Edge.
Which action corrects this problem?
- A . Ensure that the peer address does not match the Common Name on certificate.
- B . Ensure that the _cisco-uds SRV record has been configured.
- C . Ensure that the credential has been entered correctly.
- D . Ensure that the SIP domains are added on Expressway Core.
An engineer must fix broken SSH tunnels between Expressway-C (192.168.10.5) and Expressway-E (192.168.20.5). The engineer is advised that the packet capture shows the required packets for the SSH tunnels leaving the Expressway-C but not reaching the Expressway-E.
Which firewall configuration must the engineer allow to resolve this issue?
- A . port 2222 from Expressway-E to Expressway-C
- B . port 7001 from Expressway-C to Expressway-E
- C . port 7001 from Expressway-E to Expressway-C
- D . port 2222 from Expressway-C to Expressway-E
Refer to the exhibit.
An Expressway-C and Expressway-E are configured for B2B calling and the Expressway- E zone is set to TLS Verify Currently, calls do not reach the Expressway-C. The Traversal Client zone on the Expressway-C for B2B reports the information in the exhibit for the Peer 1 address.
Which action resolves this error?
- A . Configure the Expressway-C Traversal Client zone Peer 1 address with the fully qualified domain name of the Expressway-E.
- B . Configure the Expressway-C Traversal Client zone transport protocol with TCP.
- C . Add a server certificate to the Expressway-C that is signed by a certificate authority.
- D . Add an intermediate certificate to the Expressway-C that is signed by a certificate authority.
Which mechanism does TLS use to validate identity?
- A . server certificate
- B . shared secret
- C . username and a password
- D . IP address of the peer
Refer to the exhibit.
When a user tries to sign in to the Cisco Jabber client through Mobile and Remote Access, they receive this error message: “Cannot communicate with the server.” The external DNS server is configured with the SRV records listed in the exhibit.
What is the cause of the issue?
- A . The collab-edge DNS record must be added to the DNS server and the _cisco-uds DNS record must be removed.
- B . A Cisco CSF device must be configured in UC for the user and the _cisco-uds DNS record must be removed.
- C . The HTTP allow list is not allowing communication with the Instant Message and Presence server.
- D . The _sips DNS record must target expE-pub.cll-collab.internal and the _cisco-uds DNS record must be removed.
An administrator is configuring DNS to allow Mobile and Remote Access logins for the domain cisco.com.
Where must the _collab-edge_tls.cisco.com DNS SRV record be configured?
- A . in the public DNS server
- B . in DNS SRV settings under Cisco Unified OS Administration in Cisco UCM
- C . in DNS settings in the Expressway-E on the interface that faces the Internet
- D . in DNS settings under Cisco Unified OS Administration in Cisco UCM
Cisco Collaboration deployment has video endpoints that can do B2B calls over the internet, but they also can make audio calls through a gateway. This ability means that someone from the internet can make fraud calls through the system.
Which action must an engineer take to set up the search rules for calls that are being headed to the PSTN gateway?
- A . Ensure that only requests that are authenticated are allowed to make a PSTN call.
- B . Avoid using any wild card in the source settings in the search rules.
- C . Add registered devices only in the search rule for the PSTN gateway.
- D . Add registered devices only in the zone for the PSTN gateway.
Which two internal SIP endpoints behind a firewall place calls to external devices? (Choose two.)
- A . An Expressway-C communicates with the internal endpoint and forwards the media to and from an Expressway-E.
- B . A Cisco Endpoint is configured with a publicly routable static NAT SIP address to advertise instead of is private IP address.
- C . An Expressway-C communicates directly with the remote party using the ICE protocol
- D . An Expressway-E is used as a VPN server to allow remote SIP edge servers to connect calls
- E . An Expressway-C rewrites the SIP SDP to advertise its own IP address to the external party.
What is the purpose of Webex Cloud-Connected UC?
- A . It is a Cisco UCM deployed in the Webex cloud for feature parity when moving to cloud.
- B . It is a hybrid calling setup with an on-premises Cisco UCM and a Webex based Cisco UCM to benefit from both critical on-prem and flexible cloud deployments.
- C . Get the benefits of centralized cloud-based analytics and troubleshooting while keeping critical calling on-premises.
- D . It is a migration path tor moving from on-premises UC to Webex in a step by step plan.